Left-handed Band in an Electromagnetic Metamaterial Inducedby Sub-wavelength Multiple Scattering
arXiv:1809.10558 · doi:10.1063/1.5065556
Abstract
Due to the deep sub-wavelength unit cell in metamaterials, the quasi-static approximation is usually employed to describe the propagation. By making pairs of resonators, we highlight that multiple scattering also occurs at this scale and results in the existence of a dipolar resonance, which leads to a negative index of refraction when we consider several resonators. We experimentally verify the possibility of obtaining a negative index of refraction in periodic metamaterials in two different ways, and eventually demonstrates a superlensing effect in both cases.
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